Hey Mark I just purchased a 2017 Denali Ultimate Package and two weeks later I got a check engine light come on. Local dealership said it was an injector problem so I went ahead and took it back to the dealership where I made the purchase of the vehicle. Whats confusing is that the only symptom I noticed was a rough idle on cold start I really never noticed any loss in power or misfire. Yes they also told me that there is no ETA on the injectors as well. Has anyone else had this problem and if so did exchanging the injectors fix the problem for good.
